投资你了解的东西。

Invest in what you know.

了解你投资的公司，知道它在做什么生意。

Know the company you invest in and understand what business it is in.

心理学是我见过的最有用的科学，但你几乎在学术机构中学不到它。

Psychology is the most useful science, but you hardly learn it in academic institutions.

集中投资于少数你真正了解的公司，回报可能更高。

Concentrate on a few companies you truly understand.